SOLUTION: I need help factoring polynomials completely like: a^2-9ab+20b^2.

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Question 308231: I need help factoring polynomials completely like: a^2-9ab+20b^2.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
finding factors of 20 that sum to -9 ___ like -4 and -5

(a - 4b) (a - 5b)